Golf club heads with cavities and related methods

ABSTRACT

Embodiments of golf club heads with cavities and methods to manufacture golf club heads with cavities are generally described herein. In some embodiments, a golf club head comprises a body. The body comprises a strikeface, a backside of the strikeface, a heel region, a toe region opposite the heel region, a sole, a first cavity at the backside of the strikeface, a rear portion opposite the strikeface, and a second cavity at the rear portion. In many embodiments, the golf club head further comprises a cap closing off the second cavity. Other embodiments may be described and claimed.

TECHNICAL FIELD

This disclosure relates generally to golf clubs, and relates more particularly to golf club heads with cavities.

BACKGROUND

Golf club manufacturers have designed golf club heads to accommodate the preferences of an individual user as well as the individual user's golfing ability. Some golf club manufactures have designed golf club heads to accommodate the preferences of an individual user, such as an individual user's preference on the golf club head's look and feel. Some individual users may prefer a heavy look, such as a muscleback iron. Golf club manufacturers have designed golf club heads to accommodate the preferences of an individual user while designing golf club heads with enhanced weight distribution and/or a lower center of gravity.

BRIEF DESCRIPTION OF THE DRAWINGS

To facilitate further description of the embodiments, the following drawings are provided in which:

FIG. 1 depicts back, toe-side perspective view of a golf club head according to an embodiment;

FIG. 2 depicts the golf club head of FIG. 1 along the cross-sectional line 2-2 in FIG. 1;

FIG. 3 depicts a golf club head similar to the golf club head of FIG. 1 along the cross-sectional line 2-2 in FIG. 1, according to another embodiment;

FIG. 4 depicts a back, toe-side perspective, x-ray view of the golf club head of FIG. 1;

FIG. 5 depicts a back, toe-side perspective view of the golf club head of FIG. 1 according to another embodiment;

FIG. 6. depicts a front view of a golf club according to an embodiment;

FIG. 7 depicts a back, toe-side perspective view of a golf club head according to an embodiment;

FIG. 8 depicts the golf club head of FIG. 7 along the cross-sectional line 7-7 in FIG. 7;

FIG. 9 depicts the golf club head of FIG. 10 along a similar cross-sectional line 9-9 in FIG. 10, according to an embodiment;

FIG. 10 depicts a back, toe-side perspective view of a golf club head, according to an embodiment; and

FIG. 11 depicts a method of manufacturing a golf club head according to an embodiment of a method.

For simplicity and clarity of illustration, the drawing figures illustrate the general manner of construction, and descriptions and details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the golf clubs and their methods of manufacture. Additionally, elements in the drawing figures are not necessarily drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help improve understanding of embodiments of the golf club heads with cavities and related methods. The same reference numerals in different figures denote the same elements.

The terms “first,” “second,” “third,” “fourth,” and the like in the description and in the claims, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of golf club heads with cavities and related methods herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms “contain,” “include,” and “have,” and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The terms “left,” “right,” “front,” “back,” “top,” “bottom,” “side,” “under,” “over,” and the like in the description and in the claims, if any, are used for descriptive purposes and not necessarily for describing permanent relative positions. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of golf clubs and methods of manufacture described herein are, for example, capable of operation in other orientations than those illustrated or otherwise described herein.

The terms “couple,” “coupled,” “couples,” “coupling” and the like as used herein, is defined as directly or indirectly connected in a physical, mechanical, or other manner. Two or more mechanical elements may be mechanically coupled together, but not electrically or otherwise coupled together. Coupling many be for any length of time, e.g., permanent or only for an instant.

“Mechanical coupling” and the like should be broadly understood and include mechanical coupling of all types.

The absence of the word “removably,” “removable,” and the like near the word “coupled,” and the like does not mean that the coupling, etc. in question is or is not removable.

DESCRIPTION OF EXAMPLES OF EMBODIMENTS

Various embodiments include a golf club head comprising a body. The body comprises a strikeface, a backside of the strikeface, a heel region, a toe region opposite the heel region, a sole, and a rear portion opposite the strikeface. In many embodiments, the body further comprises a first cavity at the backside of the strikeface and a second cavity at the rear portion. In some embodiments, the golf club head also comprises a cap closing off the second cavity.

Some embodiments include a golf club comprising a shaft, a grip and a golf club head. The golf club head comprises a body. The body comprises a strikeface, a backside of the strikeface, a heel region, a toe region opposite the heel region, a sole, and a rear portion opposite the strikeface. In many embodiments, the body further comprises a first cavity at the backside of the strikeface and a second cavity at the rear portion. In some embodiments, the golf club head also comprises a cap closing off the second cavity.

Other embodiments include a method for manufacturing a golf club head. In many embodiments the method comprises forming a body from a first material having a first density. The body having a strikeface, a backside of the strikeface, a heel region, a toe region opposite the heel region, a sole, a first cavity at the backside of the strikeface, and a rear portion opposite the strikeface. In some embodiments, the method can also comprise forming a second cavity at the rear portion and affixing a cap at the second cavity to close off the second cavity.

Turning to the drawings, FIG. 1 illustrates a back, toe-side perspective view of a golf club head 100 according to an embodiment. Golf club head 100 is merely exemplary and is not limited to the embodiments presented herein. Golf club head 100 can be employed in many different embodiments or examples not specifically depicted or described herein.

In some embodiments, golf club head 100 can be an iron-type golf club head. In other embodiments, golf club head 100 can be another type of golf club head (e.g., a driver-type club head, a fairway wood-type club head, a hybrid-type club head, a wood-type club head, a wedge-type club head, or a putter-type club head.) In some embodiments, golf club head 100 comprises a body 101. In many embodiments, body 101 comprises a strikeface 102, a backside 104 of strikeface 102, a heel region 106, a toe region 108 opposite heel region 106, and a sole 112 at the bottom of body 101. Body 101 can further comprise a first cavity 116 at backside 104. Further, body 101 can comprise a rear portion 114 opposite strikeface 102. First cavity 116 can be between backside 104 and rear portion 114. In some embodiments, golf club head 100 can comprise a hosel, which in other embodiments can be omitted. In many embodiments, rear portion 114 can be designed to look similar to a traditional muscleback iron golf club head. For example, many muscleback irons have a full back or full rear portion of a golf club head. Muscleback irons differ from non-muscleback irons in which the rear or back of the golf club head has been hollowed out to at least partially remove the muscleback, full back and/or rear portion. In some embodiments, rear portion 114 can be designed to provide a heavy or thick look to the golf club head.

Some users may prefer a heavy look to a golf club head, such as a muscleback golf club head. However, in many instances, a muscleback golf club head may not provide an enhanced weight distribution and/or a lower center of gravity. For instance, muscleback irons with wide soles can add weight high and in the middle of the golf club head. Also, many muscleback golf clubs may have a greater loss of distance compared to non-muscleback golf clubs. Additionally, many muscleback golf clubs have a lower moment of inertia, or forgiveness, than a non-muscleback golf club. For users who prefer the heavy look to a golf club head, but would like an enhanced weight distribution, higher moment of inertia and/or a lower center of gravity, a second cavity within the rear portion or muscleback portion of the golf club head can be designed.

In some embodiments, the higher moment of inertia can be at least partially due to perimeter weighting. In other embodiments, the higher moment of inertia can be at least partially due to a second cavity in body 101. For example, in many embodiments, body 101 further comprises a second cavity 118 (FIG. 2) at or within rear portion 114. In some embodiments, second cavity 118 can be designed to enhance weight distribution of golf club head 100, while maintaining a heavy or muscleback look of rear portion 114. In some embodiments, second cavity 118 can be hollow, thereby reducing the mass and/or weight of rear portion 114. In other embodiments, second cavity 118 can be at least partially hollow. In other embodiments, second cavity 118 can comprise a filler material in all or a portion of second cavity 118. In embodiments wherein second cavity 118 comprises the filler material, the filler material can be less dense than the material(s) used for other parts of body 101 (i.e., the club head density).

In some embodiments, second cavity 118 can comprise an opening at least partially at toe region 108. In some embodiments, second cavity 118 can comprise an opening at least partially at sole 112. In some embodiments, second cavity 118 can comprise an opening at least partially at heel region 106. In many embodiments, and as shown in FIG. 1, second cavity 118 comprises an opening at least partially at toe region 108 and at least partially at sole 112 and does not comprise an opening at heel region 106. In some embodiments, second cavity 118 can be open to first cavity 116 to form one larger cavity. In some embodiments, wherein second cavity 118 is open to first cavity 116, the one larger cavity can comprise at least two distinct regions. In other embodiments, wherein second cavity 118 is open to first cavity 116, the one larger cavity can comprise a single region.

In some embodiments, second cavity 118 can be formed by removing an inner rear portion material from rear portion 114. The inner rear portion material can be removed from an opening in rear portion 114. In many embodiments, the inner rear portion material can be removed from an opening at toe region 108. In some embodiments, the inner rear portion material can be removed from an opening at sole 112 and/or an opening at heel region 106. In some embodiments, second cavity 118 can be formed by using a pull piece to remove the inner rear portion to create second cavity 118. In some embodiments, approximately 8 grams (g) to approximately 30 g of material from the inner rear portion material can be removed to form second cavity 118. In some embodiments, approximately 10 g to approximately 15 g of the inner rear portion material can be removed to form second cavity 118.

In many embodiments, mass removed and/or missing from second cavity 118 can be redistributed as perimeter weighting in golf club head 100. For example, in various embodiments, golf club head 100 can further comprise a cap 120 (FIG. 1) closing off second cavity 118. Cap 120 can provide perimeter weighting for golf club head 100. In other embodiments, such as FIG. 5, (which illustrates a back, toe-side perspective view of golf club head 100 of FIG. 1 according to an embodiment) golf club head 100 may not comprise a cap closing off second cavity 118, and second cavity 118 can be at least partially open to the environment.

In FIG. 1, cap 120 is shown at least partially at toe region 108 and at least partially at sole 112 of golf club head 100. In other embodiments, cap 120 can be located at least partially in sole 112, at least partially in toe region 108, and/or at least partially in the back of rear portion 114. In some embodiments, cap 120 can close off second cavity 118 and can cover the cavity 118 opening in body 101. In embodiments wherein there is an opening in heel region 106, cap 120 can be at least partially located in heel region 106. In other embodiments when there is an opening in sole region 112, cap 120 can be at least partially located in sole region 112. In some embodiments, cap 120 can be at least partially located in rear portion 114. In embodiments wherein second cavity 118 comprises an opening in heel region 106, cap 120 in heel region 106 can be lightweight or have a cap density that is less dense than the golf club head density of body 101. In embodiments wherein second cavity 118 comprises an opening in toe region 108, the cap density of cap 120 can be higher than a club head density of body 101. In some embodiments, cap 120 can comprise tungsten. In some embodiments, cap 120 can comprise steel. In some embodiments, cap 120 can be welded to body 101. In other embodiments, cap 120 can be bonded and/or adhered to body 101. In some examples, cap 120 can be bonded or adhered using an adhesive.

In some embodiments, cap 120 can weigh approximately 3 g to approximately 30 g. In many embodiments, when cap 120 is at least partially located at toe region 108, cap 120 can move the center of gravity (cg) lower and toward toe region 108. In embodiments when cap 120 is at least partially located in toe region 108, cap 120 can raise the moment of inertia of body 101 and golf club head 100.

In many embodiments, cap 120 can be substantially flush with body 101. In some embodiments, cap 120 can be substantially flush with rear portion 114 such that rear portion 114 can appear substantially solid. In other embodiments, cap 120 can comprise an indication, such as a different coloring or marking, to indicate that rear portion 114 is at least partially hollow, comprises perimeter weighting, and/or is not substantially solid. In other embodiments, cap 120 can at least partially protrude from body 101. In other embodiments, cap 120 can be substantially within body 101.

As shown in FIG. 1, cap 120 can be partially at toe region 108 and partially at sole 112. In other embodiments, such as cap 920 of FIG. 9 and FIG. 10, cap 920 can be at least partially within sole 112 and not visible from the back of rear portion 914. In many embodiments, cap 920 can be similar to cap 120 of FIG. 1. FIG. 9 shows a golf club head 900 along the line 9-9 of FIG. 10. FIG. 10 shows a back, toe-side perspective view of golf club head 900, according to an embodiment. In many embodiments, golf club head 900 comprises cap 920 within sole 912 and not at the back of rear portion 914.

Returning to FIG. 1, in some embodiments, first cavity 116 can be substantially parallel to strikeface 102. In some embodiments, first cavity 116 can be forward of rear portion 114, as shown in FIG. 2. FIG. 2 illustrates golf club head 100 of FIG. 1 along the cross-sectional line 2-2 of FIG. 1. In some embodiments, second cavity 118 can be substantially parallel to strikeface 102.

In some embodiments, first cavity 116 can be configured to receive an insert. For example, FIG. 8 illustrates an insert 740. FIG. 8 shows golf club head 700 along the cross-sectional line 7-7 of golf club head 700 in FIG. 7. FIG. 7 illustrates a back, toe-side perspective view of golf club head 700, according to an embodiment. As shown in FIGS. 7 and 8, Golf club head 700 comprises a body 701. In many embodiments, body 701 of FIGS. 7 and 8 can be similar to body 101 of FIG. 1. Body 701 can comprise a strikeface 702, a backside 704 of strikeface 702, a heel region 706, a toe region 708 opposite heel region 706, a sole 712, a first cavity 716 at backside 704, a rear portion 714 opposite strikeface 702, a second cavity 718 (FIG. 8), and a cap 720 closing off second cavity 718. In some embodiments, first cavity 716 can be hollow. While in many embodiments, body 701 can further comprise insert 740 (as shown in FIG. 8) at least partially within first cavity 716. In some embodiments, insert 740 can comprise a custom tuning port weight and/or a filler insert. In some embodiments, an insert material of insert 740 can be more dense than a body material of body 701. In other embodiments, the insert material of insert 740 can be the same density or less dense than the golf club head material density of body 701.

Returning to FIG. 2, rear portion 114 can have a rear portion height 127. In many embodiments and as shown in FIG. 2, rear portion height 127 can be measured from the bottom of rear portion 114 (or from a top of cap 120) to a maximum height of rear portion 114 in a direction substantially perpendicular to ground when golf club head 100 is at address. Also as shown in FIG. 2, strikeface 102 can have a strikeface height 130. Strikeface height 130 can be measured from the bottom of rear portion 114 (or from a top of cap 120) to the top of strikeface 102 in a direction substantially perpendicular to ground when golf club head 100 is at address. As measured, strikeface height 130 can be substantially parallel to rear portion height 127. In many embodiments, rear portion height 127 can be approximately one-fourth to approximately one-half of strikeface height 130. In other embodiments, rear portion height 127 can be approximately one-half to approximately three-fourths of strikeface height 130. In some embodiments, rear portion height 127 can be equal to approximately one-half of strikeface height 130.

In various embodiments, second cavity 118 can comprise a second cavity height 125. In some embodiments, second cavity height 125 can be approximately 0.20 inch (in.) to approximately 0.28 inch in height. In some embodiments, second cavity 118 can comprise a second cavity length 430 (shown in FIG. 4). In some embodiments, second cavity length 430 can be approximately 1.7 inches to 2.1 inches in length. In many embodiments, second cavity 118 can also comprise a volume of second cavity 118. In some embodiments, the volume of second cavity 118 can be approximately 0.08 in³ to approximately 0.10 in³.

In some embodiments, second cavity 118 can be contoured to follow the shape of rear portion 114. In many embodiments, one or more of the wall(s) of second cavity 118 can at least partially follow the shape of rear portion 114. For example, FIG. 2 shows walls 217, 219, 221, and 223 of second cavity 118 as being substantially parallel to the walls of rear portion 114. In other embodiments, second cavity 118 can only partially follow only one or more wall(s) of rear portion 114 and can have a different shape. For example, second cavity 318 (FIG. 3) can partially follow one or more wall(s) of rear portion 314 and have a trapezoid cross section shape as shown in FIG. 3.

FIG. 3 illustrates a golf club head 300 similar to the golf club head of FIG. 1 along cross-sectional line 2-2 of FIG. 1, according to another embodiment. Golf club head 300 comprises a strikeface 302, a backside 304 of the strikeface, a first cavity 316, and a sole 312. In this embodiment, second cavity walls 317 and 319 substantially follow the walls of rear portion 314, while second cavity walls 321 and 323 partially follow only one or more of the walls of rear portion 114. In other embodiments, second cavity 318 can have a substantially triangular, rectangular, square, or circular cross section. In some embodiments, the cross section of second cavity 318 can change throughout rear portion 314. For example, at the heel region, the cross section of second cavity 318 can be larger in area than the cross section of second cavity 318 at the toe region. In other examples, the cross section of second cavity 318 at the heel region can be smaller in area than the cross section of second cavity 318 at the toe region. Second cavity 318 can be covered by a cap 320.

In some embodiments, returning to FIG. 2, wall(s) 217, 219, 221, and/or 223 surrounding second cavity 118 can be substantially thin. For example, in some embodiments wall(s) 217, 219, 221, and/or 223 can be approximately 0.001 in. to approximately 0.400 in. In some embodiments, wall(s) 217, 219, 221, and/or 223 can be approximately 0.040 in. to approximately 0.150 in.

FIG. 4 illustrates another back, toe-side perspective, x-ray view of club head 100 of FIG. 1. In FIG. 4, second cavity 118 is shown as dashed lines within rear portion 114. In some embodiments, second cavity 118 can extend from heel region 106 to toe region 108. In other embodiments, second cavity can extend from the middle of rear portion 114 to toe region 108. In some embodiments, second cavity can extend from the middle of rear portion 114 to heel region 106. In other embodiments, second cavity can be located only at toe region 108. Second cavity 118 can be substantially parallel to strikeface 102. In other embodiments, only one wall of second cavity 118 can be substantially parallel to strikeface 102. In some embodiments, second cavity 118 is not substantially parallel to strikeface 102. In many embodiments, second cavity 118 can be substantially hollow and/or empty. In other embodiments, second cavity 118 can comprise a weight or other filler material.

Some embodiments include a fully assembled golf club, such as a golf club 6000 as shown in FIG. 6. FIG. 6 shows a front view of a golf club 6000 according to an embodiment. In some embodiments, golf club 6000 can comprise a shaft 615, a grip 610 at one end of shaft 615, and a golf club head 600 coupled to shaft 615 at an opposite end of shaft 615. In many embodiments, golf club head 600 can be similar to golf club head 100 (FIG. 1), golf club head 300 (FIG. 3), golf club head 700 (FIG. 7), and/or golf club head 900 (FIG. 10). In some embodiments, golf club 6000 is an iron-type golf club. In other embodiments, golf club 6000 can be another type of golf club head (e.g., a driver-type club head, a fairway wood-type club head, a hybrid-type club head, a wood-type club head, a wedge-type club head, or a putter-type club head.)

Various embodiments include a method 1100 for manufacturing a golf club head as shown in FIG. 11. FIG. 11 depicts a method of manufacturing a golf club head according to an embodiment. In some embodiments, method 1100 can be used to manufacture a golf club head similar to golf club head 100 (FIG. 1), golf club head 300 (FIG. 3), golf club head 700 (FIG. 7), and/or golf club head 900 (FIG. 10).

In many embodiments, method 1100 comprises forming a body from a first material having a first density (block 1105). In some embodiments, forming a body from a first material can comprise forging the body. In other embodiments, forming a body from a first material can comprise casting the body. In some embodiments, method 1100 can comprise manufacturing a golf club head for an iron-type club head. In many embodiments, method 1100 can comprise forming a strikeface, a backside of the strike face, a heel region, a toe region opposite the heel region, a sole, and a first cavity at the backside of the strikeface for the body formed in block 1105.

In many embodiments, method 1100 can further comprise forming a rear portion opposite the strikeface in the body formed in block 1105. In many embodiments, and similar to as described above and shown in FIG. 2, the rear portion can have a rear portion height. In many embodiments, the rear portion height can be measured from the bottom of the rear portion to a maximum height of the rear portion. Additionally, as shown in FIG. 2, strikeface 102 can comprise a strikeface height which can be measured from the bottom of rear portion 114 to the top of strikeface. As shown in FIG. 2, as measured, strikeface height 130 can be substantially parallel to rear portion height 127. In many embodiments, forming the second cavity in block 1110 of method 1100 can comprise forming the rear portion height to be approximately one-fourth to approximately one-half of the strikeface height. In other embodiments, forming the second cavity in block 1110 can comprise forming the rear portion height to be approximately one-half to approximately three-fourths of the strikeface height. In some embodiments, forming the second cavity in block 1110 of method 1100 can comprise forming the rear portion height to be equal to approximately one-half of the strikeface height.

In some embodiments, method 1100 can comprise configuring the first cavity to receive an insert, while in other embodiments first cavity can be configured to be hollow and/or to not receive an insert. For example, method 1100 can comprise forming body 701, as shown in FIG. 7, and configuring first cavity 716 to receive insert 740. In some embodiments, an insert material of insert 740 can be more dense than a body material of body 701. In other embodiments, the insert material of insert 740 can be the same density or less dense than the body material of body 701. In some embodiments, a length of the first cavity can be substantially parallel to the strikeface, as shown by first cavity 116 of FIG. 1. In some embodiments, the first cavity can be forward of the rear portion, such as shown in golf club head 100 of FIG. 2.

In many embodiments, method 1100 can also comprise forming a second cavity at the rear portion (block 1110) and affixing a cap at the second cavity to close off the second cavity (block 1115). In some embodiments, block 1110 of forming the second cavity at the rear portion can further comprise removing an inner rear portion material from the rear portion. In many embodiments, the inner rear portion can be removed from an opening in the toe region. In some embodiments, the inner rear portion can be removed from an opening in the sole and/or an opening in the heel. In some embodiments, the second cavity at the rear portion formed in block 1110 can be formed by using a pull piece to create the second cavity. In some embodiments, block 1110 comprises removing approximately 8 g to approximately 30 g of material from the rear portion. In some embodiments, block 1110 comprises removing approximately 10 g to approximately 15 g from the rear portion.

Forming the second cavity in block 1110 can further comprise extending the second cavity from the heel region to the toe region. For example, as shown in FIG. 4, second cavity 118 can be formed to extend from heel region 106 to toe region 108. In other embodiments, forming the second cavity can comprise extending the second cavity from the middle of the rear portion to the toe region. In some embodiments, forming the second cavity can comprise extending the second cavity from the middle of the rear portion to the heel region. In other embodiments, forming the second cavity can comprise forming second cavity at the toe region. In some embodiments, block 1110 of method 1100 can further comprise forming the second cavity to be substantially parallel to the strikeface. For example, as shown in FIG. 4, second cavity 118 can be substantially parallel to strikeface 102. In other embodiments, block 1110 can comprise forming the second cavity wherein only one wall of the second cavity can be substantially parallel to the strikeface. In some embodiments, the second cavity is not formed to be substantially parallel to the strikeface. In many embodiments, block 1110 of method 1100 can comprise forming the second cavity to be hollow and/or empty. In other embodiments, block 1110 method 1100 can comprise forming the second cavity so that the second cavity can comprise a weight and/or other filler material.

In some embodiments, forming the second cavity in block 1110 of method 1100 can comprise forming the second cavity to have a second cavity height. In various embodiments, forming the second cavity in block 1110 can comprise forming the second cavity height to be approximately 0.20 inch to approximately 0.28 inch in height.

In some embodiments, forming the second cavity in block 1110 of method 1100 can comprise forming a second cavity length, such as second cavity length 430 as shown in FIG. 4, to be approximately 1.7 inch to approximately 2.1 inch in length. In many embodiments, forming the second cavity in block 1110 of method 1100 can comprise forming the second cavity to have a second cavity volume of approximately 0.08 in³ to approximately 0.10 in³. In some embodiments, forming the second cavity in block 1110 can comprise removing approximately 3 g to approximately 30 g from the rear portion. In other embodiments, forming the second cavity in block 110 can comprise removing approximately 3 g to approximately 11 g from the rear portion. In some embodiments, forming the second cavity in block 1110 comprises forming the second cavity to be hollow.

In many embodiments, forming the second cavity in block 1110 comprises forming the second cavity only at the rear portion. For example, second cavity 118 of FIG. 2 can be formed at rear portion 114. In many embodiments, forming the second cavity in block 1110 of method 1100 can comprise contouring the second cavity to follow the shape of the rear portion, such as, in some examples, second cavity 118 of FIG. 2. In other embodiments, forming the second cavity in block 1110 can comprise forming the second cavity to comprise a different cross-sectional shape, such as a trapezoidal shape as shown in second cavity 318 of FIG. 3.

In other embodiments, forming the second cavity in block 1110 can comprise forming the second cavity to comprise a substantially triangular, rectangular, square, or circular cross-section in at least a portion of the second cavity. In some embodiments, the cross-section of the second cavity can change throughout the rear portion. In other embodiments, the cross-section of the second cavity can remain the same throughout the rear portion of the golf club head. For example, the second cavity formed in block 1110 can have a cross-sectional area at the heel region larger than the cross section of the second cavity at the toe region. In other examples, the cross-sectional area of second cavity formed in block 1110 at the heel region can be smaller than the cross-sectional area at the toe region.

In some embodiments, the one or more of the walls surrounding the second cavity (such as wall(s) 217, 219, 221, and/or 223 in FIG. 2) can be formed to be substantially thin. For example, in some embodiments, wall(s) 217, 219, 221, and/or 223 of FIG. 2, can be formed to be approximately 0.001 in. to approximately 0.400 in. in thickness. In some embodiments, wall(s) 217, 219, 221, and/or 223 can be formed to be approximately 0.040 in to approximately 0.150 in. in thickness.

In some embodiments, method 1100 can further comprise affixing a cap at the second cavity to close off the second cavity (block 1115). In many embodiments, affixing the cap at the second cavity comprises affixing the cap at least partially at the toe region of the golf club head. For example, FIG. 1 shows cap 120 affixed at least partially at toe region 108 of golf club head 100. In other embodiments, affixing the cap at the second region can comprise affixing the cap at least partially at the sole of the golf club head, at least partially at the toe region, and/or at least partially at the heel region of the golf club head. In some embodiments, affixing the cap at the second region can comprise affixing the cap at least partially at the rear portion. In some embodiments, the cap can weigh approximately 3 g to approximately 30 g. In some embodiments, the cap can weigh approximately 3 g to approximately 25 g.

In many embodiments, the cap comprises a cap density of the cap that is higher that a club head density of the body. In other embodiments, the cap comprises a cap density of the cap that is the same or lower than the club head density of the body. In some embodiments, the cap can comprise tungsten. In some embodiments, the cap can comprise steel. In many embodiments, cap 120 can be affixed so that it is substantially flush with the body of the golf club head. For example, as shown in FIG. 1, cap 120 is substantially flush with body 101 of golf club head 100. In other embodiments, the cap can at least partially protrude from the body.

The golf club heads with cavities and related methods discussed herein may be implemented in a variety of embodiments, and the foregoing discussion of these embodiments does not necessarily represent a complete description of all possible embodiments. Rather, the detailed description of the drawings, and the drawings themselves, disclose at least one preferred embodiment of systems and methods for fitting golf club head weight, and may disclose alternative embodiments of golf club heads with cavities and related methods.

All elements claimed in any particular claim are essential to golf club heads with cavities and related methods claimed in that particular claim. Consequently, replacement of one or more claimed elements constitutes reconstruction and not repair. Additionally, benefits, other advantages, and solutions to problems have been described with regard to specific embodiments. The benefits, advantages, solutions to problems, and any element or elements that may cause any benefit, advantage, or solution to occur or become more pronounced, however, are not to be construed as critical, required, or essential features or elements of any or all of the claims.

As the rules to golf may change from time to time (e.g., new regulations may be adopted or old rules may be eliminated or modified by golf standard organizations and/or governing bodies such as the United States Golf Association (USGA), the Royal and Ancient Golf Club of St. Andrews (R&A), etc.), golf equipment related to the apparatus, methods, and articles of manufacture described herein may be conforming or non-conforming to the rules of golf at any particular time. Accordingly, golf equipment related to the apparatus, methods, and articles of manufacture described herein may be advertised, offered for sale, and/or sold as conforming or non-conforming golf equipment. The apparatus, methods, and articles of manufacture described herein are not limited in this regard.

Moreover, embodiments and limitations disclosed herein are not dedicated to the public under the doctrine of dedication if the embodiments and/or limitations: (1) are not expressly claimed in the claims; and (2) are or are potentially equivalents of express elements and/or limitations in the claims under the doctrine of equivalents. 

1. A golf club head comprising: a body comprising: a strikeface; a backside of the strikeface; a heel region; a toe region opposite the heel region; a sole; a first cavity at the backside of the strikeface; a rear portion opposite the strikeface; and a second cavity at the rear portion; and a cap at least partially at the sole and closing off the second cavity, the cap comprising a cap density higher than a body density of the body; wherein: at least a portion of the second cavity is hollow when the cap closes off the second cavity.
 2. The golf club head of claim 1, wherein: the first cavity is configured to receive an insert.
 3. The golf club head of claim 1, wherein: a length of the first cavity is substantially parallel to the strikeface and forward of the rear portion.
 4. The golf club head of claim 1, wherein: the second cavity extends from the heel to the toe and is substantially parallel to the strikeface.
 5. The golf club head of claim 1, wherein: the cap is at least partially at the toe region of the golf club head.
 6. The golf club head of claim 1, wherein: a rear portion height of the rear portion is equal to approximately ¼ to approximately ½ of a strikeface height of the strikeface; and the second cavity is located only at the rear portion.
 7. The golf club head of claim 1, wherein: the cap weighs approximately 3 g to approximately 30 g.
 8. The golf club head of claim 1, wherein: the cap comprises a cap material comprising tungsten.
 9. The golf club head of claim 1, wherein: the cap is substantially flush with the body.
 10. The golf club head of claim 1, wherein: the golf club head is an iron-type club head; and at least a portion of the first cavity is located between the strikeface and the second cavity.
 11. A golf club comprising: a shaft; a grip; and a golf club head comprising: a body comprising: a strikeface; a backside of the strikeface; a heel region; a toe region opposite the heel region; a sole; a first cavity at the backside of the strikeface; a rear portion opposite the strikeface; and a second cavity at the rear portion; and a cap at least partially at the sole and closing off the second cavity, the cap comprising a cap density higher than a body density of the body; wherein: at least a portion of the second cavity is hollow when the cap closes off the second cavity.
 12. The golf club of claim 11, wherein: the first cavity is configured to receive an insert.
 13. The golf club of claim 11, wherein: a length of the first cavity is substantially parallel to the strikeface and forward of the rear portion.
 14. The golf club of claim 11, wherein: the second cavity extends from the heel to the toe and is substantially parallel to the strikeface.
 15. The golf club of claim 11, wherein: the cap is at least partially at the toe region of the golf club head.
 16. The golf club of claim 11, wherein: a rear portion height of the rear portion is equal to approximately ¼ to approximately ½ of a strikeface height of the strikeface; and the second cavity is located only at the rear portion.
 17. The golf club of claim 11, wherein: the cap weighs approximately 3 g to approximately 30 g.
 18. The golf club of claim 11, wherein: the cap comprises a cap material comprising tungsten.
 19. The golf club of claim 11, wherein: the cap is substantially flush with the body.
 20. The golf club of claim 11, wherein: the golf club head is an iron-type club head; and at least a portion of the first cavity is located between the strikeface and the second cavity.
 21. A method for manufacturing a golf club head, comprising: forming a body from a first material having a first density, the body having: a strikeface; a backside of the strikeface; a heel region; a toe region opposite the heel region; a sole; a first cavity at the backside of the strikeface; and a rear portion opposite the strikeface; forming a second cavity at the rear portion; and affixing a cap at the second cavity and at least partially at the sole to close off the second cavity wherein: at least a portion of the second cavity is hollow when the cap closes off the second cavity; and the cap comprises a cap density higher than a body density of the body.
 22. The method for manufacturing the golf club head of claim 21, wherein: forming the second cavity further comprises: removing an inner rear portion material from the rear portion, wherein the inner rear portion material is removed from an opening in the toe.
 23. The method for manufacturing the golf club head of claim 22, wherein: removing the inner rear portion material from the rear portion comprises removing approximately 8 g to approximately 15 g from the rear portion.
 24. The method for manufacturing the golf club head of claim 21, wherein: the first cavity is configured to receive an insert.
 25. The method for manufacturing the golf club head of claim 21, wherein: a length of the first cavity is substantially parallel to the strikeface and forward of the rear portion.
 26. The method for manufacturing the golf club head of claim 21, wherein: forming the second cavity further comprises extending the second cavity from the heel to the toe; and the second cavity is substantially parallel to the strikeface.
 27. The method for manufacturing the golf club head of claim 21, wherein: the cap is at least partially at the toe region of the golf club head.
 28. The method for manufacturing the golf club head of claim 21, wherein: a rear portion height of the rear portion is equal to approximately ¼ to approximately ½ of a strikeface height of the strikeface; and the second cavity is located only at the rear portion.
 29. The method for manufacturing the golf club head of claim 21, wherein: the cap weighs approximately 3 g to approximately 30 g.
 30. The method for manufacturing the golf club head of claim 21, wherein: the cap comprises a cap material comprising tungsten.
 31. The method for manufacturing the golf club head of claim 21, wherein: the cap is substantially flush with the body.
 32. The method for manufacturing the golf club head of claim 21, wherein: the golf club head is an iron-type club head; and at least a portion of the first cavity is located between the strikeface and the second cavity.
 33. The golf club head of claim 4, wherein: a length of the second cavity is approximately 1.7 inches to approximately 2.1 inches, measured from the heel to the toe.
 34. The golf club of claim 14, wherein: a length of the second cavity is approximately 1.7 inches to approximately 2.1 inches, measured from the heel to the toe.
 35. The method for manufacturing the golf club head of claim 26, wherein: a length of the second cavity is approximately 1.7 inches to approximately 2.1 inches, measured from the heel to the toe. 